376 THE ZOOLOGIST. 
subgenera of Cariacus are recognized. ‘These are Furcifer, 
Blastoceros, Cariacus, and Coassus. The first two of these groups 
I shall be obliged in the present connection to regard as sections 
of the subgenus Cariacus, for, aside from the form of the antlers, 
I find no tangible characters in Brooke’s diagnoses by which the 
species may be distinguished from those of Cariacus. The small 
amount of material which I have been able to examine seems to 
warrant such a disposition of them. Coassus, on the other hand, 
presents many characters which distinguish it from Cariacus. In 
Sir V. Brooke’s valuable diagnoses four differential characters 
may be found. These are as follows:—In Coassus (a) the 
auditory bulle are less inflated than in Cariacus; (6b) the 
rhinarium is ample, as in Cervulus ; (c) the facial profile is more 
arched than in Cariacus ; and (d) the stature is small. In the 
first three of these characters our new species agrees with 
Cariacus rather than with Coassus. The fourth character, 
relating to stature, is perhaps scarcely worthy of consideration 
as a subgeneric distinction ; it is a matter apparently correlated 
with the small size of the antlers. To bring together our new 
Deer and the various species of Coassus, on account of their 
small size, would not be more logical than to approximate 
two large species merely on the score of their common mag- 
nitude. 
Leaving size out of consideration, therefore, C. clavatus, 
judged by the diagnoses of Sir Victor Brooke, belongs in the 
subgenus Cariacus. I now desire to bring forward three addi- 
tional characters which this new Deer possesses in common with 
the known species of the subgenus Cariacus, and which separate 
it from Coassus. 
It is pointed out by Sir V. Brooke that in the Deer of the 
New World the vomer extends backward in the nasal cavity, 
dividing it into two completely separated compartments. Upon 
examining the vomer in the different species of the subgenus 
Cariacus, C. virginianus, macrotis, &c., I find that the posterior 
end of the superior horizontal plate, while it covers the pre- 
sphenoid, does not extend over the suture between the 
presphenoid and the basisphenoid. The free posterior margin 
of vertical plate is falcate, and in old individuals the attenuated 
extremity of the same curves backward, and touches, or actually 
grows into, the surface of the basisphenoid. In Coassus, on 
